... ID card, support for password operation; ER-691C ER-690C Mifare ONE and Mifare Light support ... consumption, consumption time punch card invalid; 11,ER-691C ER-690C can specify different consumption group, group ... -691D ER-690D didn't this function12,ER-691C ER-690C disoperation refund function; ER-691D didn ... ,Operating frequency: ER-691D ER-690D 125KHz; ER-691C ER-690C: 13.56MHz5,Read distance: ≥ 40mm; ...